The Yamada Advantag: Quality, Performance, and Reliabilty\r\n\r\nWhen it comes to quality, performance, and reliability, there's no better value in air-operated, double-diaphragm pumps than Yamada. We've been helping companies like yours solve their liquid transfer problems since 1905....and have over four decades of worldwide experience in the design and manufacture of air-operated diaphragm pumps.